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Created by Master Student

Biology Practice Test #9

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At some point in their development, chordates possess all of the following EXCEPT

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A researcher has a black guinea pig and wishes to determine if it carries a recessive allele for white hair. Both of the guinea pig's parents are black. Which of the following would be the best method for the researcher to use?

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Which of the following characteristics of an allele is required for it to increase in a population through natural selection?

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Tissue that conducts sugars downward from the leaves

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Which biome contains maples, squirrels, and black bears?

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An organism produces many offspring each reproductive season, only a few of which survive. The survivorship curve for this organism can BEST be described as

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This nucleic acid carries genetic information to the site of translation.

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Geese recognize a ticking clock as "mother" if exposed to it during a critical period shortly after hatching

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Which of these releases carbon dioxide? I. Lactic acid fermentation II. Alcohol fermentation III. Aerobic respiration IV. Photosynthesis

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Crabs and lobsters are both members of the suborder Pleocyemata. Both possess a tail; however, in the crab, this structure is very small and not used. This structure can be considered an example of all of the following EXCEPT

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A somatic cell of the common octopus (Octopus vulgaris) has 56 chromosomes. What number of chromosomes will an octopus gamete contain?

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This organ secretes a hormone that causes the liver to break down glycogen.

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Which of the following indicates that animals have internal biological clocks?

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The steps of protein synthesis and modification take place in several different locations throughout the cell. What is the proper order of these locations, from start to finish? I. Ribosome II. Nucleus III. Golgi apparatus IV. Endoplasmic reticulum

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A population of birds lives in an area with many insects upon which it feeds. The insects live inside trees, burrowing into the bark. Over many hundreds of years, the average beak size in the bird population has increased. This is due to

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This is required for speciation to occur.

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Which of these mutations in a gene will MOST LIKELY result in a shortened protein with a long sequence of substituted amino acids?

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Transports amino acids during protein synthesis

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Which describes the cause of eutrophication in lakes?

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Semelparous species produce a large number of offspring once in their life spans. Iteroparous species produce a small number of offspring repeatedly throughout their lives. Which ecological condition will most likely select for a semelparous strategy?

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A unicellular organism contains a Golgi body and ribosomes but lacks a cell wall. It is heterotrophic, ingesting food via phagocytosis. What kingdom does this organism belong to?

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As a reaction proceeds, reactants form a transition state, which then forms the products. An enzyme affects the energy of the

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An organism that demonstrates radial symmetry and an exoskeleton would be classified into which phylum?

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Which of these does NOT secrete any digestive enzyme?

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What is the role of mRNA in protein synthesis?

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The loop of Henle is a structure within the urinary tract responsible for reabsorbing water. Compared to a terrestrial species, how might this structure appear in a freshwater aquatic species?

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A genetic mutation results in a DNA sequence that continues to synthesize the same protein, at the same rate as a nonmutated sequence. This mutation would be BEST classified as a

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Human immunodeficiency virus (HIV) is a retrovirus that integrates its own DNA into a host cell's genome using

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A human hereditary disorder that is present only in males is most likely

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Which of these form the basis of natural selection? I. Random mating II. Limited environmental resources III. Stable genotype frequencies over time

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During mitosis, a checkpoint ensures that all chromosomal kinetochore proteins, present at the centromere of each sister chromatid, are attached to spindle fibers. Kinetochore proteins that are unattached produce a signal that prevents mitosis from proceeding to the next stage. This checkpoint occurs at the transition from

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Which structure releases hormones that signal the tissue lining the uterus to thicken?

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A barren, rocky community near a lake has virtually no vegetation or animal life. After a period of approximately 75 years, the community boasts a wide variety of flora and fauna, including deciduous trees, deer, and raccoon. Usually the first organisms to colonize rocky areas are lichen. These are known as the

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Pepsinogen is secreted by the cells lining the stomach. In a low-pH solution, it is converted to an active enzyme, called pepsin. The purpose of producing pepsinogen instead of pepsin is to

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In a tropical food web, 800,000 kJ of energy are produced by autotrophic species. Approximately how much energy will exist at the level of secondary consumers?

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Edward's syndrome is the result of an additional 18th chromosome present in a fertilized embryo. Which of the following events could lead to the presence of this additional chromosome in a zygote?

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How do enzymes help to carry out biochemical reactions?

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Biome characterized by great diversity of flora and fauna and high levels of precipitation

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In the Oparin-Haldane experiment, the artificial atmosphere they created contained which of the following? I. Hydrogen gas II. Oxygen gas III. Reducing gases

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What is the role of mRNA in protein synthesis?

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